Portable vacuum



FIG. 1 is a front perspective view of a portable vacuum showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof; and,

FIG. 5 is a top plan view thereof.

The broken lines are for illustrative purposes only and form no part of the design claimed. 

The ornamental design for a portable vacuum, as shown and described. 